ATI AR-15 Rail System is a six sided 12 inch rifle length free float AR-15 handguard it is ultra light and comes with a picatinny rail package and FS8 ATI handguard nose cone and barrel nut. This is one of the best upgrades you can do to your 223 5.56 AR15 rifle this free float handguard rail is made from Military Type III Hard Anodized, 6061 T6 Aluminum and fits most AR-15 rifles and variants. The free float Forend handguard allows you to insert rails at 45 Angles around the circumference of the rifle AR forend for ultimate versatility, and a more natural placement of AR-15 accessories lights forgrips laser sight etc. Picatinny top rail perfectly aligns with AR-15 flat-top upper receivers you can mount scopes on the top rail and BUIS or Red dot sights onto the 45 Rail makes switching between long and short range rargeting as quick as a twist of the wrist.